Claude Fable 5 vs MAI-Thinking-1
Claude Fable 5 (2026) and MAI-Thinking-1 (2026) are frontier-tier reasoning models from Anthropic and Microsoft AI. Claude Fable 5 ships a 1m-token context window, while MAI-Thinking-1 ships a 256k-token context window. On SWE-bench Verified, Claude Fable 5 leads by 22.5 pts. This comparison covers specs, pricing, API access, capabilities, benchmarks, input and output token costs, and production fit for coding and agent workloads.
Claude Fable 5 is safer overall; choose MAI-Thinking-1 when provider fit matters.
Decision scorecard
Local evidence first| Signal | Claude Fable 5 | MAI-Thinking-1 |
|---|---|---|
| Best for | reasoning-heavy apps, multimodal apps, and tool-calling agents | reasoning-heavy apps and tool-calling agents |
| Decision fit | Coding, RAG, and Agents | Coding, RAG, and Agents |
| Context window | 1m | 256k |
| Cheapest output | $50/1M tokens | - |
| Provider routes | 8 tracked | 1 tracked |
| Shared benchmarks | SWE-bench Verified leader | 2 shared |
Decision tradeoffs
- Claude Fable 5 holds a shared-benchmark lead on SWE-bench Verified, ahead by 22.5 points.
- Claude Fable 5 has the larger context window for long prompts, retrieval packs, or transcript analysis.
- Claude Fable 5 has broader tracked provider coverage for fallback and route flexibility.
- Claude Fable 5 uniquely exposes Vision, Multimodal, and Structured outputs in local model data.
- Local decision data tags Claude Fable 5 for Coding, RAG, and Agents.
- Local decision data tags MAI-Thinking-1 for Coding, RAG, and Agents.
Monthly cost at traffic
Estimate token spend from the cheapest tracked input and output route or tier on this page.
Claude Fable 5
$20,500
Cheapest tracked route/tier: Anthropic
MAI-Thinking-1
Unavailable
No complete token price in local provider data
Cost delta unavailable until both models have sourced input and output token prices.
Switch friction
- Provider overlap exists on Microsoft Foundry; start route-level A/B tests there.
- Check replacement coverage for Vision, Multimodal, and Structured outputs before moving production traffic.
- Provider overlap exists on Microsoft Foundry; start route-level A/B tests there.
- Claude Fable 5 adds Vision, Multimodal, and Structured outputs in local capability data.
Specs
| Specification | ||
|---|---|---|
| Released | 2026-06-09 | 2026-06-02 |
| Context window | 1m | 256k |
| Parameters | — | 1T total / 35B active |
| Architecture | Decoder Only | Mixture of Experts |
| License | Proprietary | Proprietary |
| Openness | Proprietary | Proprietary |
| Weights | Not released | Not released |
| Code | Unknown | Unknown |
| Commercial use | Commercial use: conditional | Commercial use: conditional |
| Knowledge cutoff | - | - |
Pricing and availability
| Pricing attribute | Claude Fable 5 | MAI-Thinking-1 |
|---|---|---|
| Input price | $10/1M tokens | - |
| Output price | $50/1M tokens | - |
| Providers |
Capabilities
| Capability | Claude Fable 5 | MAI-Thinking-1 |
|---|---|---|
| Vision | Yes | No |
| Multimodal | Yes | No |
| Reasoning | Yes | Yes |
| JSON / Tool use | Yes | Yes |
| Structured outputs | Yes | No |
| Code execution | No | No |
| IDE integration | No | No |
| Computer use | No | No |
| Parallel agents | No | No |
Benchmarks
| Benchmark | Claude Fable 5 | MAI-Thinking-1 |
|---|---|---|
| SWE-bench Verified | 96.0 | 73.5 |
| SWE-bench Pro | 80.3 | 52.8 |
Continue comparing
Last reviewed: 2026-08-24. Data sourced from public model cards and provider documentation.